Research Progress of Ionic Porous Organic Polymers
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摘要: 离子型多孔有机聚合物（i-POP）是一种框架或孔道中具有离子位点的新型多孔有机聚合物。i-POP比表面积大且可设计性强，其理化性质和活性位点可以通过改变离子化构筑单元来调控。与中性多孔有机聚合物相比，i-POP结构中可控的离子位点和高电荷密度拓宽了多孔有机聚合物的应用范围；同时，可将孔道的限域效应、框架的特定功能与电荷性质结合，进一步增强其功能特性。近年来，非晶态i-POP的组成结构和合成方法得到较大的发展，并且在吸附与分离、催化等领域展现出重要的应用价值。Abstract: Ionic porous organic polymer (i-POP) is an emerging class of organic porous polyelectrolytes featuring ionized backbones or side groups on the skeletons. i-POPs are highly designable exhibiting large specific surface areas and intrinsic nanopores. Their physicochemical properties and functionality can be skillfully regulated by varying ionized building blocks. Compared with neutral porous organic polymers, i-POPs possess controllable ionic sites and high charge density, broadening the application ranges of porous organic polymers. Meanwhile, their applicability can be strengthened by the inherent association between pore confinement, skeleton function, and abundant ionic sites. The compositions, structures, and synthetic methods of amorphous i-POPs have been significantly explored in recent years. Tremendous studies have demonstrated that i-POPs are promising for various advanced applications including adsorption/separation, sensing, catalysis and so on.
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图 4 i-POP在吸附分离领域中的应用：(a) TAPOP-1的结构；(b) TAPOP在氧气、二氧化碳、氮气条件下的发射强度变化[28]；(c) MeLi@N-CMP的结构；(d) N-CMP, MeLi@N-CMP和Li@N-CMP的氢气负载量[31]；(e) POP-Im1的结构；(f) POP-Im1处理的K2Cr2O7 溶液的颜色变化[32]；(g) CPPs-ImPro的合成方法；(h) CPPs-ImPro吸附SO2的机理[18]
Figure 4. Application of i-POP in absorption and separation: (a) Structure of TAPOP-1; (b) Evolution of emission intensity of TAPOP when purged with oxygen, carbon dioxide, and nitrogen[28]; (c) Structure of MeLi@N-CMP; (d) H2 uptake of N-CMP, MeLi@N-CMP, and Li@N-CMP[31]; (e) Structure of POP-Im1; (f) Color change of aqueous K2Cr2O7 solution dealt with POP-Im1[32]; (g) Synthetic pathway to CPPs-ImPro; (h) Mechanism of CPPs-ImPro for SO2 capture[18]
图 5 i-POP在催化领域中的应用：(a) Ir(I)@bipyCTF的结构；(b，c) Ir(I)@bipyCTF催化1,2-二氯苯硼化反应的动力学特征和循环试验[34]；(d) Pd@i-PT1的TEM图像和Pd粒径分布[22]；(e) Pd@i-PTn催化反应示意图；(f) i-HCPs的结构；(g) i-HCPs催化反应产率随时间的变化；(h) i-HCPs催化剂的循环稳定性[7]
Figure 5. Application of i-POP in catalysis: (a) Structure of Ir(I)@bipyCTF; (b, c) Kinetic profiles and reusability of Ir(I)@bipyCTF for 1,2-dichlorobenzene[34]; (d) TEM image and particle size distribution of Pd@i-PT1[22]; (e) Schematic of Pd@i-PTn catalyzed intermolecular oxidative coupling of diphenylether to dibenzofuran; (f) Structure of i-HCPs; (g) Time-resolved profile and (h) reusability of i-HCPs[7]
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